Keystones — Lintel
Five GCSE retrieval questions · 10 May 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
620000
Answer: 6.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 25°. Find adjacent side
Answer: 26.3cm -
4. Ratio Mixed ratio problems
Divide 88 in the ratio 1:2:1
Answer: 22, 44 and 22 -
5. Statistics Mean
The mean of 6 numbers is 30. If 5 of them are 20, 30, 45, 21, 47, what is the missing number?
Answer: 17